APA (7th ed.) Citation

Howell, Rogers, & Henderson. (2006). World of plants. Usborne Pub.

Chicago Style (17th ed.) Citation

Howell, Rogers, and Henderson. World of Plants. London: Usborne Pub, 2006.

MLA (8th ed.) Citation

Howell, et al. World of Plants. Usborne Pub, 2006.

Warning: These citations may not always be 100% accurate.